This is a real beaut, I found it in my Grandfaters house. I think it was found around the 40's or 50's in central Texas. Looks to be a giant spear point. Gimme some info.
That is a beauty!!!...The Indian that made that one really knew what he was doing. It's worth a good bit but more since it was found in your grandfathers house. Ebay would be the place to sell it if you really want to though!
Unusual material for TX, I would have guessed further Northeast. It would be a knife most likely. There's several different time periods it could be from.